<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="../css/reset.css">
    <style>
        .a {
            width: 300px;
            height: 300px;
            background-color: #ddd;
            overflow: hidden;
            text-align: center;
            margin: 100px;
            position: relative;
        }

        .c {
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background-color: #f00;
            margin: 10px auto;
        }

        .hide {
            /* width: 70px;
            height: 50px;
            background-color: #000;

            position: absolute;
            left: 0;
            right: 0;
            margin: auto;
            top: 55px;

            transform: translateY(-120px);
            transition: 1s; */

            
        }

        .a:hover .hide {
            transform: translateY(0);
        }
    </style>
</head>

<body>

    <div class="a">
        <div class="c"></div>
        <h3>22222222</h3>
        <p>3333333333</p>
        <div class="hide"></div>
    </div>

</body>

</html>